Lock



Dec.11,1923. 1,477,318

G. F. GRASS LOCK Filed July 5. .1922

Patented Dec. 1K1, 1923.

UNITED STATES GEORGE I?. GRASS, OF ITHACA, NEW YORK.

LOCK.

` Application led July 5, 1922. rSerialnl'o. 572,882.

To all vwhom it may concern:

Be it known that I, GEORGE citizen of the United States of siding atIthaca, in the county of Tompkins and State of N ewYork, have invented certain new and useful' Improvements in Locks,

F. CRAss, a America, re-

of which the yfollowing is a specification.

This invention relates to certain new and useful improvements in locks, and has particular reference to a lock embodying a plurality of tumbler pins that are adapted to be shifted to certain positions to permit operation or opening of the loc The primary object of the inventionref sides in the provision of a lock wherein a casing supporting a rotatable barrel, has a plurality of tensioned plunger pins that yare adapted to be projected into the openings formed in said barrel to hold the barrel and locked bolt carried thereby against movement, separate tumbler pins slidably mounted in the openings in said barrel adapted to be operated for shifting the tumbler pins carried by the casing to permit rotation of the barrel andcausing the tumbler -pins carried by the casing to ride upon the periph# ery of said barrel.

With the above general objects in view and others that will appear as the nature of the invention is better understood,l the same consists of the novel form, combination and arrangement ofparts hereinafter more fully described, shown in the accompanying drawing and claimed.V

Inl the drawing, wherein Alike reference characters designate corresponding parts throughout the several views.

Figure l is a side elevational View of a lock constructed `in accordance with the present invention,

Figure 2 is an endelevational view of the same showing the rotatable barrel of the lock and the key opening in the end of the barrel,

Figure 3" is a end of thelock, showing by dotted lines, the locking bolt associated with the rotatable barrel, l

Figure 4 is a top plan view of the lock,

Figure 5 is a cross sectional view taken locked position,

planview of the opposite on line V-V of Fig. l' showing" the rotatablev barrel within the lock'casing and the tensioned tumbler pin lcarriedby the lock casing extending into openings yand in en-V gagement with tumbler pins carried by the. rotatable barrel. l Y i Figure 6 isa longitudinal sectional view taken on line VI-VI of Fig. 4 showing the positions assumed by the tumbler pins when the b-arrel and bolt carried ythereby are in` and further showing the initial entrance of vthe operating key into the rotating barrel,` Y Figure 7 is a longitudinal sectional View similar to Fig.y 6, showing the operating key entirely received within the rotating barrel vwith the key partially rotated to cause the tumbler pin carried by the barrel to elevate the tumbler pin carried by theflock i casing to permit rotation of the b-arrel within the casing,

Figure 8 is atop plan viewof the rotate able barrel removed from the casing,

Figure 9 is a cross sectional view taken on line IX-IX of Fig. 8 showing the key engaging lugs carried by the rotatable barrel, and- Y Figure 10 shows cross sectional views of various type of keys that maybe employed for operatingithe lock.

Referring more in detail to the accom'- panying drawing, the lock'embodies a casing formed of end walls l and 2 connected by a' cylindrical casingy 3 and longitudinal brace bars 4l positioned above thecasing 3 as clearly shownin Figs/1, 4 and 5, the ex'- treme upper ends o-f the walls l andj2 being connected by a rib 6. v

A barrel- 7, is 'rotatably disposed within thel cylindrical casing 3, one end thereof being shouldered as at 7a for engagement with a corresponding shoulder "formed on' the adjacent end wall 2, as vshown in F igs.'6 and 7 while the opposite end of thebarrel eX-y tends beyond the casing 3 and receives a collar 8 retained thereon by a set screw 9 to' present axial mo-vement of the barrel within the casing, As shown by dotted lines, a locking bolt l0 is eccentricallypivoted to theprojecting end of the barrel and of the pins and are retained 'in the outer ends of the openings 11 by the strip bar 1li countersunk within the upper edge oi the rib 6 and retained so positioned by the faswhen 'the .itrom the end wall' 18' of said tening devices 15. The barrel' 7 is similarly i provided with spaced alined openings 11a thatare' adapted to register with the ,openings 11-in the' casing rib while said' open- 11a Afreely''support sliding tumbler pins 1 2i`. It will be note'dthat the tumbler pins 12'are` of equal lengths, as shown in Figll7 while the tumbler pins 12a carried byy the rotatable barrel 7 are of unequal lengths for purposes presently to appear. I

To support the tumbler pins 12 and 12a barrel 7 isv in a locked position relative' to the' cylindrical' casingy 8, an aiially disposed rod 16 positioned in the eccentric bore 17 of, the' barrel 7, projects c l bore and terminates at a point'inwardly ci the key hole openinO 19in the' shouldered end of the barrel 7 the tumbler pins 12u beingsup# ported by the yrod 16 asshown in gFig'. 6 while the sprili'g pressed tumbler pins 12 are supported on the outer ends of the tumbler pins 12a. l In this position, the spring pressed tumbler pins 12 extend from the openings 1'1 in thecasing' rib 6 into the openings 1121 in the barrel 7' forming an interleckingconnection between the barrel' 7 and cylindrical casing section 3 toprevent rotarymovement of the barrel within the casing., f y. u

The key employed for yshitting the tumbler pins 12 and 12a, and rotating the barrel 7 for sh'ift'ingthe lock bolt 10 embodies a shankhaving a plain sidew 20 and an opposi'tely disposed longitudinally extending rib 21 that is notched' as at 22 while said key shank i's'provided with an axial bore 23'to bereceived on the rod 16 of the rotatable barrel`7. The outer end Yci the shank carries a suitable headf2l, and the rib 21 of the key shank adjacent said head is provided with a notch 25 that is adapted, upon rotation ofthe key in the barrel 7 'to receive the shoulder 26 dependingy from theJ key hole openin'gl) to pre'v'e'ntre'mov'al of thelrey irm the lock. l l f n'positioning the key within the bore 17 ofthe rotatable barrel 7, the axialbore 231 of the key shank receives the rod 16 and the p tumbler pinsV 12? ride over the plain upper side 2O of? the key shank as shown in Fig.A

` 6, the forward beveled edge ott-he inner end of spaced alined, openings lof the key shitting the tumbler pins 12 to permit insertion oi' the key within the locking barrel. When the key has been entirely received within the barrel and upon the rod 16, the same is rotated by the head 24 to present the several notches 22 in the rib 21 for reduction oi" the tumbler pins 12, it being understood that the notches are oi' different depth to compensate for the dilerent lengths of thetumbler pins 12a tor shitting the same to the position shown in Fig. 7, at which time the contacting` edges of the tumbler pins 12 and 12 are alined with the connecting walls' between the periphery oi' the rotatable barrel v7 and the inner tace of the cylindrical casing" section 3 vas illustrated.' With the key rotated tothe position shown in riga the and an or ntf 2i o is presented io'rr engagement with the ilug'27 carried by the inner'wall of the bore 17 at the inner end thereof as and 9, urtl'ierrotation of the key causing the rib end 21 thereof to engage" said lug 27 Y for, rotating the barrel 7 to shift the' lock bolt 10'..y During this movement, the ad jacent ends of the tumbler ypins 12and 122 shown in Figs. 6,17

will ride over the contacting surfaces be# tween the rotatable' barrel 7 and the inner faceof the cylindrical casing;section,3. In

order' to effect .a reverse'rotation of the lock' barrel 7 the key isr'otated upon the rod' 16 which willy permit'the tumbler pins 12jL toi 'a'll' upon the' plainvside 2O of the key shank and upon continued rotation'ot1 said key, the end 21" V the lug 271fwithin the inner end'oit the bore 17 of the barrel 7 for shiiting'the barrel' and' lock bolt 10, and' also ypresenting the open`- ings 11n in the barrel for registration with the openings 11 inthe casing'rib 6 for the springs 13)t toV vforce the ltumbler pins 12into the barrel openings 11a, as' shown' 'in Fig.` 6';

" ith the tumblers 12 and 12h' so positioned,

ous transverse configurations carried thereby.`

From the above detail description ofthe device, it is believed that the construction and opera-tion thereof will at once be apfparent, and while" there are' herein shown and described the preferred embodiments 0i' the` present invention, itis nevertheless to be understood that minor changes therein without departing from the `spiritandscopel of the invention as claimed.

Whatis claimed as new is :f-

In' a lock ofthe type described, a casing,

may be made the key and barrel with the barrel carried means positioned axially of the bore thereof, v

and cooperating means Carried b-y the inner 10 p end of the barrel bore and the key to affect rotation of the barrel in opposite directions.

In testimony whereof I aHiX my signature.

GEORGE F. GRASS. 

